Kidneys are vital organs of the body because they help in

The correct answer is all of these functions. 

Explanation:

• Kidneys are the excretory organs in the majority of mammals including humans
• They play a vital role in the body by performing the following functions

1. Kidneys regulate water and electrolyte balance i.e. osmoregulation.
2. Kidneys remove the metabolic waste and foreign chemicals out of the body
3. They regulate the acid-base balance in the body.

• Kidney perform these functions by the Nephrons
• A nephron is a functional and structural unit of the kidney (organ), which is involved in the process of excretion.
• It is made up of renal corpuscle or Bowman’s capsule, Glomerulus, Proximal Convoluted tubule, Loop of Henle, and Distal Convoluted Tubule.
• Bowman’s capsule is a double-walled cup-like structure in which the dense network of blood capillaries (Glomerulus) is present.
• Thus, the correct option is ''all of these functions''

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